Product Overview
The FIRST ALERT SC7010B Hardwired Combination Photoelectric Smoke and Carbon Monoxide Alarm with Battery Backup provides comprehensive detection for both smoke and carbon monoxide in a single, integrated unit. It is designed to offer reliable protection against two major household threats.
Equipped with a photoelectric sensor and Optipath 360 technology, this alarm effectively detects smoke from smoldering fires while minimizing false alarms. An advanced electrochemical sensor is included for detecting carbon monoxide leaks, which can originate from various fuel-burning appliances and blocked chimneys. In the event of a detected threat, the alarm emits a distinct spread spectrum horn tone, specifically designed to be audible to individuals with age-related hearing loss.
This 120-volt hardwired unit integrates directly into your home's electrical system and includes a battery backup feature, ensuring continuous operation even during power outages. The alarm's perfect mount system facilitates easy installation and precise alignment. A low battery latch provides a visual indicator when the battery requires replacement. Additionally, a convenient test/silence button allows for easy functional checks and temporary muting of nuisance alarms.

Image: Three First Alert SC7010B-3 combination smoke and carbon monoxide detectors.
Key Features
- 3-Pack 120-Volt Hardwired Combination Alarm: Photoelectric smoke and electrochemical Carbon Monoxide alarms with battery backup.
- Convenient Battery Backup: Utilizes 2-AA batteries to ensure continuous operation during power outages.
- Test/Silence Button: Allows for easy testing of alarm function and silencing of nuisance alarms.
- Spread Spectrum Horn: Features a lower frequency horn designed to be more easily heard by individuals with age-related hearing loss.
- Intuitive Latching Alarm: Remembers which unit initiated an alarm in interconnected systems.
- Low Battery Latch: Provides a visual indication when the battery is low.

Image: Key features highlighted on the detector, including 2-in-1 protection, test & silence button, and hardwire installation.
Setup and Installation
The First Alert SC7010B-3 is designed for hardwired installation into your home's electrical system, providing reliable, continuous power. It also includes a battery backup for operation during power interruptions.
Installation Steps:
- Safety First: Always turn off power at the circuit breaker before beginning installation.
- Mounting: Secure the mounting bracket to the ceiling or wall according to local codes and the included instructions.
- Wiring: Connect the alarm to your household wiring using the provided hardwire adapter. Refer to the wiring diagram on the back of the unit and in the full user manual for correct connections (Black to Black, White to White, Orange to Orange for interconnect).
- Battery Installation: Install the 2-AA backup batteries into the designated compartment.
- Attach Alarm: Twist the alarm onto the mounting bracket until it clicks securely into place.
- Power On & Test: Restore power at the circuit breaker and press the Test/Silence button to confirm proper operation.

Image: Hardwire adapter and battery backup compartment with AA batteries.

Image: Rear view of the detector with wiring instructions and model details.
For detailed wiring diagrams and specific installation requirements, please consult the complete user manual.
Operation
Test/Silence Button
The large Test/Silence button on the front of the alarm serves two primary functions:
- Testing: Press and hold the button to test the alarm's electronic circuitry, horn, and battery function. The alarm will sound if working correctly. Test your alarm weekly.
- Silencing: In case of a nuisance alarm (e.g., from cooking smoke), press the button to temporarily silence the alarm for several minutes. The alarm will automatically reset after the silence period if the smoke or CO condition has cleared.
Understanding Alarm Signals
Your combination alarm provides distinct audible signals for different conditions:

Image: Explanation of Carbon Monoxide as an invisible, odorless, and deadly gas.

What does the beep mean?

Smoke/Fire Alarm: 4 beeps and a pause.

Low Battery: 1 beep every minute.

End of Life: 5 beeps every minute.
Maintenance
Regular maintenance ensures the optimal performance and longevity of your First Alert combination alarm.
- Weekly Testing: Press the Test/Silence button weekly to ensure the alarm is functioning correctly.
- Battery Replacement: Replace the 2-AA backup batteries annually, or immediately when the low battery signal (1 beep per minute) sounds. Always use fresh, high-quality alkaline batteries.
- Cleaning: Clean the alarm regularly to prevent dust and debris buildup, which can affect sensor performance. Use a soft brush attachment on your vacuum cleaner to gently remove dust from the alarm's vents. Do not paint the alarm.
- End of Life: The alarm has a 10-year lifespan. After 10 years from the date of manufacture, the unit will signal its end-of-life (5 beeps per minute). Replace the alarm immediately when this signal occurs.
Troubleshooting
If your alarm is not functioning as expected, refer to the following common issues and solutions:
| Problem | Possible Cause / Solution |
|---|---|
| Alarm chirps once every minute. | Low battery. Replace the 2-AA batteries immediately. |
| Alarm chirps 5 times every minute. | End of life. The alarm has reached its 10-year operational limit. Replace the unit. |
| Alarm sounds without apparent smoke/CO. | Nuisance alarm. Press the Test/Silence button to temporarily silence. Check for cooking fumes, steam, or dust. Clean the alarm if necessary. |
| Alarm does not sound during test. | Check power connection and battery installation. Ensure power is on at the circuit breaker. If issues persist, the unit may need replacement. |
| Alarm sounds continuously. | Indicates presence of smoke or carbon monoxide. Evacuate premises and call emergency services. Do not re-enter until cleared by authorities. |
If troubleshooting steps do not resolve the issue, refer to the full user manual or contact First Alert customer support.
Specifications
| Feature | Detail |
|---|---|
| Model Number | SC7010B-3 |
| Power Source | 120-Volt AC Hardwired with 2-AA Battery Backup |
| Sensor Type | Photoelectric (Smoke), Electrochemical (CO) |
| Alarm Loudness | 85-decibel |
| Product Dimensions | 2.25"D x 5.25"W x 5"H |
| Item Weight | 0.74 Pounds (approx. 11.8 ounces) |
| Battery Cell Type | Alkaline |
| Operating Humidity | Up to 85 percent relative humidity |
| Included Components | 3 Alarms, 2-AA batteries (per alarm), Mounting brackets and hardware |

Image: Detector dimensions and 10-Year Limited Warranty seal.
Important Safety Information
About Carbon Monoxide (CO)
Carbon monoxide is an invisible, odorless, and deadly gas produced by incomplete combustion of fuels. Sources can include furnaces, water heaters, gas ranges, fireplaces, and vehicle exhaust. CO alarms are crucial for early detection of this poisonous gas.

Common Sources of CO

Furnace

Dryer Vent

Chimney
Recommended Placement
For optimal protection, install smoke and carbon monoxide alarms on every level of your home, including basements, and inside every bedroom. Consider additional alarms in hallways and living areas.

Image: House diagram illustrating recommended placement for smoke and CO alarms.
Warranty and Support
Your First Alert SC7010B-3 Combination Smoke and Carbon Monoxide Detector is backed by a 10-Year Limited Warranty. This warranty covers defects in material and workmanship under normal use and service.
For warranty claims, technical support, or any questions regarding the operation or maintenance of your alarm, please contact First Alert customer service. Refer to the official First Alert website or the full user manual for contact information and detailed warranty terms.
Additional Resources
For comprehensive information, including detailed installation instructions, wiring diagrams, and advanced troubleshooting, please download the official user manual:






